Hi! I am a Vietnamese Passport holder and studying in Germany at the moment.

Next month I will be in South Korea for 6 months due to an exchange term. During that time, I would love to travel to HK. Do I need a visa for that when I am planning to stay there 1 week. Besides, I found no chinese embassy in Seoul and of course I still have valid entry permits for Europe and Korea.
Thank you in advance and have a nice day!